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Title:
SEAL STRUCTURE OF VERTICAL PUMP
Document Type and Number:
Japanese Patent JP2000073981
Kind Code:
A
Abstract:

To prevent the leakage of chemicals by forming a flap so as to be freely deformed for contact and separation over from a position for air-tightly fitting to a lower surface of a rotor to a position for separating downward from the rotor.

Step-out phenomenon as a magnet coupling is generated by the rotation of a rotor 11 during the operation of a pump, and a flap 13 is separated downward from the rotor 11 by the bounce of both of magnets 10, 12 to each other, the self-rotation of the flap 13 and the negative pressure inside of a barrel tube 4 generated during the operation of the pump so as to form a clearance (s) between the rotor 11 and the flap 13. Immediately after the operated pump is stopped and the rotor 11 is integrally stopped with the rotary shaft 9, the rotary shaft 9 is released from a load, and can be freely turned, and an N-pole and an S-pole of both the magnets 10, 11 of the rotor 11 and the flap 13 correspond to each other and an attractive force works so as to pull up the flat 13, and a constant surface pressure is generated in a lower surface 11a of the rotor 11 by a top surface of the flap 13 for airtight sealing, and sealing performance is showed. Consequently, leakage of the chemicals and corrosive gas outside can be hindered.


Inventors:
SANO YOSHIYUKI
Application Number:
JP24848098A
Publication Date:
March 07, 2000
Filing Date:
September 02, 1998
Export Citation:
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Assignee:
SEIKOW CHEM ENG MACH
International Classes:
F04D29/10; F04D13/00; F04D13/02; F16J15/34; (IPC1-7): F04D13/00; F04D13/02; F04D29/10; F16J15/34
Attorney, Agent or Firm:
Yoshihiro Tsunoda (3 others)



 
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